WW3AFTR330 Equivalent & Substitute Parts

Part Overview

The WW3AFTR330 is a 330 mOhms ±1% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features moisture-resistant construction and operates across a wide temperature range from -55°C to 350°C. The part is currently in active production status with 941 units in stock. Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory constraints, lead time considerations, or specific packaging requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

WW3AFTR330

Stackpole Electronics IncIn Stock: 1037WW3AFTR330 Datasheet

Current PartRFQ

43FR33E

OhmiteIn Stock: 81643FR33E Datasheet

MFR RecommendedRFQ

ALSR03R3300FE12

Vishay DaleIn Stock: 1231ALSR03R3300FE12 Datasheet

MFR RecommendedRFQ

RS02BR3300FE70

Vishay DaleIn Stock: 3690RS02BR3300FE70 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WW3AFTR330 are qualified based on the following electrical and mechanical parameters:

Core Substitution Criteria:

• Resistance value: 330 mOhms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Number of terminations: 2

All identified substitute parts meet these core electrical specifications. Variations in physical dimensions, operating temperature ranges, and packaging formats (Tape & Reel, Bulk, Cut Tape) do not affect functional substitutability in applications where the WW3AFTR330 is specified. Temperature coefficient alignment (±90ppm/°C) is maintained across primary substitutes.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts maintain active product status and meet ROHS3 or equivalent RoHS compliance requirements. Selection among WW3AFTR330, 43FR33E, ALSR03R3300FE12, and RS02BR3300FE70 should be based on:

Inventory and Lead Time: RS02BR3300FE70 offers the highest stock level at 3661 units. ALSR03R3300FE12 provides 1133 units. Both Vishay Dale parts support rapid procurement.

Operating Temperature Considerations: WW3AFTR330 supports the extended upper temperature limit of 350°C. Applications requiring operation above 275°C must use the Stackpole part. For applications within -55°C to 250°C, all four parts are functionally equivalent.

Packaging Requirements: Tape & Reel format is available only with WW3AFTR330. Cut Tape format is available with RS02BR3300FE70. Bulk packaging applies to 43FR33E and ALSR03R3300FE12. Packaging selection depends on assembly process requirements and volume considerations.

Compliance Status: All parts maintain ROHS3 compliance or equivalent. REACH status is unaffected or vendor-defined across the substitute group, supporting use in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can 43FR33E replace WW3AFTR330 in all applications? A: 43FR33E is electrically equivalent for applications operating within -55°C to 275°C. Applications requiring sustained operation above 275°C must use WW3AFTR330, which is rated to 350°C.

Q: What is the difference between ALSR03R3300FE12 and RS02BR3300FE70? A: Both are Vishay Dale 330 mOhms 3W wirewound axial resistors with identical electrical specifications. RS02BR3300FE70 is available in Cut Tape packaging with significantly higher inventory (3661 vs. 1133 units). ALSR03R3300FE12 has slightly smaller physical dimensions (4.57mm x 12.70mm vs. 4.75mm x 14.22mm).

Q: Are physical dimension differences between substitute parts significant? A: Physical dimensions vary slightly across the substitute group. WW3AFTR330 and RS02BR3300FE70 share identical dimensions (0.187" Dia x 0.560" L). 43FR33E measures 0.220" Dia x 0.594" L. ALSR03R3300FE12 measures 0.180" Dia x 0.500" L. PCB layout and mechanical clearance requirements determine whether dimension variations affect board-level compatibility.

Q: Which substitute part has the best availability? A: RS02BR3300FE70 has the highest current inventory at 3661 units in stock, followed by ALSR03R3300FE12 at 1133 units.

Q: Do all substitute parts meet RoHS requirements? A: Yes. WW3AFTR330, ALSR03R3300FE12, and RS02BR3300FE70 are ROHS3 Compliant. 43FR33E is RoHS Compliant. All parts satisfy RoHS regulatory requirements.

Q: What packaging formats are available? A: WW3AFTR330 is supplied in Tape & Reel format. RS02BR3300FE70 is supplied in Cut Tape format. 43FR33E and ALSR03R3300FE12 are supplied in Bulk format. Packaging selection should align with assembly equipment and procurement volume requirements.